Physics M.C.Q (1 Marks)

Which gates is represented by this figure

The output of OR gate is 1

Which logic gate is represented by the following combination of logic gates

A gate in which all the inputs must be low to get a high output is called

The output of a NAND gate is 0

In the CB mode of a transistor, when the collector voltage is changed by 0.5 volt. The collector current changes by 0.05 mA. The output resistance will be

Which logic gate is represented by following diagram

This symbol represents

The Boolean equation of NOR gate is

If A and B are two inputs in AND gate, then AND gate has an output of 1 when the values of A and B are

The given truth table is of

Which represents NAND gate 
 

Which of the following gates will have an output of 1(a)

How many NAND gates are used to form an AND gate
 

A gate has the following truth table The gate is

A logic gate is an electronic circuit which

The logic behind ‘NOR’ gate is that it gives

Boolean algebra is essentially based on

The truth table shown in figure is for

Given below are four logic gate symbol (figure). Those for OR, NOR and NAND are respectively

In a transistor in CE configuration, the ratio of power gain to voltage gain is

NPN transistor are preferred to PNP transistor because they have

In NPN transistor the collector current is 10 mA. If 90% of electrons emitted reach the collector, then

Consider an NPN transistor amplifier in common-emitter configuration. The current gain of the transistor is 100. If the collector current changes by 1 mA, what will be the change in emitter current

Which of the following is used to produce radio waves of constant amplitude

When NPN transistor is used as an amplifier

Which of these is unipolar transistor

In a transistor configuration b-parameter is

In a transistor, a change of 8.0 mA in the emitter current produces a change of 7.8 mA in the collector current. What change in the base current is necessary to produce the same change in the collector current

In case of NPN-transistors the collector current is always less than the emitter current because

In a common base amplifier circuit, calculate the change in base current if that in the emitter current is 2 mA and a = 0.98

For a transistor, the current amplification factor is 0.8. The transistor is connected in common emitter configuration. The change in the collector current when the base current changes by 6 mA is

The part of a transistor which is heavily doped to produce a large number of majority carriers, is

For the given combination of gates, if the logic states of inputs A, B, C are as follows A = B = C = 0 and A = B = 1, C = 0 then the logic states of output D are

An NPN-transistor circuit is arranged as shown in figure. It is

The most commonly used material for making transistor is

The combination of ‘NAND’ gates shown here under (figure) are equivalent to

The symbol given in figure represents

A common emitter amplifier is designed with NPN transistor (a = 0.99). The input impedance is 1 KW and load is 10 KW. The voltage gain will be

Given below are symbols for some logic gates

The XOR gate and NOR gate respectively are

In a PNP transistor the base is the N-region. Its width relative to the P-region is

A transistor is used in common emitter mode as an amplifier. Then

For a transistor the parameter b = 99. The value of the parameter a is

The transfer ratio of a transistor is 50. The input resistance of the transistor when used in the common-emitter configuration is 1 KW. The peak value for an A.C input voltage of 0.01 V peak is